Prospero - neat reference that's exactly what Cordelia calls it. The buffyverse database gives us this from season 3's Choices:

XANDER: (getting up) Well, look who just popped open a fresh can of venom. Hey, did you hear about Willow getting into Oxnard?
WILLOW: Oxford.
XANDER: Oxford. And M.I.T. and Yale and every other college on the face of the planet. As in your face I rub it.
CORDELIA: Oxford? Whoopee! Four years in tea-bag central. Sounds thrilling. And M.I.T. is a Clearasil ad with housing. And Yale is a dumping ground for those who didn't get into Harvard.
WILLOW: I got into Harvard.

Ahem, I saw the initial comment in an entirely different context when I first read it so thanks for the Cordelia clarification (just google 'teabagging' if you don't know what I mean ;). And in the UK you can get tea pretty much anywhere you can get coffee which no-doubt includes some cinemas.

Was lucky enough to see 'Bladerunner' on a huge outdoor screen a few years back and it was a great experience (the next night they showed 'The Great Escape', also good fun but more 'interactive' with people shouting "Go on Steve !" at, y'know, that bit - as if he might actually make it if we just gave him enough encouragement ;).

('2001' is the only one of the sci-fi films that I haven't seen on the big screen so that'd be my vote - but since i'm not going I won't vote to avoid possibly queering someone's pitch)